set get_biggest_subset(set set_of_sets){	set res_set = set_of_sets.get_element();	if (res_set){		for(el in set_of_sets){			res_set -= el;		}		return res_set;	}	else{		return {}	}}int main(set args){	set s1 = {1, "3", 4, "5", 6, 7, False};	set s2 = {{1,2,3}, 1, 2, 5};	set s3 = {s1, s2};	set s4 = get_biggest_subset({s1, s2, s3});	for(element in s4){		print element;	}	return 1;}main()